Mode Field Adaptor- Forward

Mode field is different in fibers with different core diameter and NA. Splicing loss is large between two fibers with different mode field. In order to reduce splicing loss, mode field must be similar. MFA can optimize splice loss significantly, usually <0.5dB, even <0.3dB between different fibers.

Mode Field Adaptors is designed to makes two fiber to keep mode field diameter matched with low fundamental mode signal loss and minimal degradation of beam quality (M2).These devices can also be used to absorb residual pump light in the reverse direction, preventing damage to the seed or isolator.

Define small MFD fiber to large MFD fiber is F-Forward, large MFD to small MFD is B-Backward. Custom Mode Field Adaptors can be designed to meet a wide range of fiber types.

Features Applications
·         Low Insertion Loss

·         High Power Handling

·         Custom Configurations Available

 ·         Fiber Lasers

·         Fiber Amplifiers

General Configuration for Forward SM MFA: 1.0μm

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1020~1080 HI1060 or 6/125 DC 10/125 DC ≤0.3 30W
1020~1080 15/130 DC ≤0.3 30W
1020~1080 20/125 DC ≤0.3 30W
1020~1080 25/250 DC ≤0.5 30W
1020~1080 30/250 DC ≤0.5 30W
1020~1080 20/400 DC ≤0.5 100W
1020~1080 10/125 DC or SC 15/130 DC ≤0.5 30W
1020~1080 20/125 DC ≤0.5 30W
1020~1080 25/250 DC ≤0.5 50W
1020~1080 30/250 DC ≤0.5 100W
1020~1080 20/400 DC ≤0.5 100W

 

General Configuration for Forward PM MFA: 1.0μm

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1020~1080 SM98-PS-U25D (PM980) or Nufern PM980-XP 10/125 PM DC ≤0.5 30W
15/130 PM DC ≤0.5 30W
1020~1080 20/125 PM DC ≤0.5 30W
1020~1080 25/250 PM DC ≤0.5 100W
1020~1080 20/400 PM DC ≤0.5 100W
1020~1080 10/125 PM DC or

Nufern PM1060L

 15/130 PM DC ≤0.5 30W
1020~1080 20/125 PM DC ≤0.5 30W
1020~1080 25/250 PM DC ≤0.5 100W
1020~1080 30/250 PM DC ≤0.5 100W
1020~1080 20/400 PM DC ≤0.5 100W

General Configuration for Forward MFA: 1.5μm

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1530~1570 SMF-28 SM-GDF-1550 ≤0.5 30W
1530~1570 SM-GDF-1550 12/130µm,NA0.20/0.46 ≤0.5 50W
1530~1570 12/130µm,NA0.20/0.46 25/300µm,NA0.09/0.46 ≤0.5 100W
1530~1570 PM1550 Panda PM-GDF-1550 ≤0.5 30W
1530~1570 PM-GDF-1550 PM 12/130µm,NA0.20/0.46 ≤0.5 50W
1530~1570 PM 12/130µm,NA0.20/0.46 PM 25/300µm,NA0.09/0.46 ≤0.5 100W

General Configuration for Forward MFA: 2.0μm

Working Wavelength(nm) Signal Input Fiber Signal Output Fiber Signal Insertion Loss (dB) Max. Power Handling
1950~2050 Nufern SM1950 10/130µm,NA0.15/0.46 ≤0.5 30W
1950~2050 10/130µm,NA0.15/0.46 25/250µm,NA0.09/0.46 ≤0.5 30W
1950~2050 Nufern PM1950 PM10/130µm,NA0.15/0.46 ≤0.5 30W
1950~2050 PM10/130µm,NA0.15/0.46 PM25/250µm,NA0.09/0.46 ≤0.5 100W

Remark:

  • Other configuration and higher power handling can be customized.
  • All MFA default with bare fiber, 0.8m length of pigtail, please contacts us for special request.
  • The signal loss means the fundamental mode signal loss.
  • ER≥18dB for PM fiber MFA.

Package Information

Package Type P1 P2 P3
Dimensions (mm) Ф4.0×60 65x12x7 80x12x8

*Due to ongoing design improvements, the package size is subject to change. According to the different configuration, power handling, and fiber core diameter, we will choose the appropriate package size. Please contact DK Photonics for confirmation.

*Device package must be mounted onto heat sink (active cooling is suggested) with thermal paste for high power.

Order information   P/N: MFA (PMMFA)-A-B-C-D-E-F

When you inquire, please provide the correct P/N number according to our ordering information, and attach the appropriate description would be better.

A B C D E F
Working Wavelength Direction Power Handling Input Fiber Type Output Fiber Type Fiber length
03:1030nm

64:1064nm

55:1550nm

20:2000nm

 F:Forward

B:Backward

 05:5W

10:10W

25:25W

50:50W

XX: Other

 XXX(fiber name) XXX(fiber name) 08:0.8m(default)

10:1.0m

20:2.0m

Part Number Example: PMMFA-64-F-30-10/125/008/046-25/250/006/046 -08

Description: 1064nm PM Mode Field Adaptor, Forward, Max. 30W power handling, PM 10/125µm, 0.08/046NA input signal fiber, PM 25/250µm, 0.06/046NA output fiber, 0.8m fiber length.

Ordering Information for Custom Parts

If you need to customize other specifications, please provide detailed description for your requirement.

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